sbrk.S revision 99116
1/* 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This software was developed by the Computer Systems Engineering group 6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 7 * contributed to Berkeley. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * from: Header: brk.s,v 1.3 92/06/25 12:56:05 mccanne Exp 38 */ 39 40#if defined(SYSLIBC_SCCS) && !defined(lint) 41 .asciz "@(#)sbrk.s 8.1 (Berkeley) 6/4/93" 42#if 0 43 RCSID("$NetBSD: sbrk.S,v 1.7 2000/07/25 15:14:46 mycroft Exp $") 44#endif 45#endif /* SYSLIBC_SCCS and not lint */ 46#include <machine/asm.h> 47__FBSDID("$FreeBSD: head/lib/libc/sparc64/sys/sbrk.S 99116 2002-06-30 05:36:49Z obrien $"); 48 49#include "SYS.h" 50 51 .data 52 .globl HIDENAME(curbrk) 53 .globl HIDENAME(minbrk) 54 .type HIDENAME(curbrk),@object 55 .type HIDENAME(minbrk),@object 56 .align 8 57HIDENAME(curbrk): 58 .xword CNAME(_end) 59HIDENAME(minbrk): 60 .xword CNAME(_end) 61 62_SYSENTRY(sbrk) 63 PIC_PROLOGUE(%o3, %o2) 64 SET(HIDENAME(curbrk), %o2, %o3) 65 ldx [%o3], %o4 66 add %o4, %o0, %o5 67 mov %o5, %o0 68 mov SYS_break, %g1 69 ta %xcc, ST_SYSCALL 70 bcc,a,pt %xcc, 1f 71 mov %o4, %o0 72 ERROR() 731: retl 74 stx %o5, [%o3] 75_SYSEND(sbrk) 76